Lock



Sept. 3, 1935.

E. N. JACOB! LOCK 2 Sheets-Sheet 1 Filed Nov. 3, 1935 E. N. JACOBI Sept. 3, 1935.

LOCK

' 2 Sheets-Sheet 2 Filed Nov. 3, 1933 Patented Sept. 3, 1935 UNITED STATES PATENT OFFICE LOCK Edward N. Jacobi, Milwaukee, Wis.,' assignor to Briggs & Stratton Corporation, Milwaukee, Wis, a corporation of Delaware Application November 3, 1933, Serial No. 696,465

. 9 Claims. This invention relates to improvements in tumbler locks and has as a general object to proance in the mechanism to be driven by the lock to accommodate this over-travel of the cylinder.

It is, therefore, an object of this invention to provide means for removably securing a lock cylinder'in its mounting member which is so constructed as to permit insertion and removal of the cylinder in an intermediate position within its normal limits of rotation and at the same time preclude accidental detachment of the cylinder.

the abutment having a normal width greater.

than that of the entrance gateway and having means for decreasing its efiective width so as to permit passage thereof through the gateway ,when it is desired to either insert or remove the cylinder.

With the above and other objects in view which will appear as the description proceeds, myinvention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawings, 1 have illustrated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles thereof, and in which: i

Figure 1 is a view partly in longitudinal section and partly in elevation, illustrating a look structure embodying this invention;

Figure 2 is a cross sectional view taken through Figure 1 on the plane of the line 2-2;

Figure Bis a view similar to Figure 2, illustrating the movable abutment part in its inoperative position;

Figure 4 is a cross sectional view taken through Figure 1 on the plane of the line 4-4; and

Figure 5 is a perspective view of the mounting member and lock cylinder illustrating their relative positions during insertion and removal of the cylinder.

Referring now more particularly to the accom- 'panying drawings in which like numerals indicate like parts throughout the several views, and

numeral 6 represents a lock cylinder of conventional construction having a plurality of spring pressed tumblers I.

' The cylinder 6 'is rotatably mounted in the bore 8 of a mounting member 9 and the tumblers l are arranged to project into a longitudinal groove ID in the mounting member to secure the cylinder in its normal locked position, the tumblers being retractable to free the cylinder for rotation upon the insertion of a proper key.

The mounting member 9 in the present instance is in the form of a cylindrical shell disposed in the outer end of a supporting member II. This supporting member II is mounted on a panel I2, being secured thereon by a nut l3 threaded on the outer end of the supporting member. The outer flange of the nut l3 has an opening M to expose the head l5 of the lock cylinder. v T

Inasmuch as the invention is directed primarily to the means for securing the cylinder in its mounting member, the particular supporting structure illustrated does not form part thereof and is shown merely for purposes of illustration, the invention being readily applicable to other installations.

Formed in the inner end of the cylinder is a bayonet slot l6 having anentrance gateway I1 and an arcuate groove l8, and engageable in the bayonet slot is a solid abutment l9 carried by the adjacent inner end portion of the mounting member 9.

The width of the abutment I9 is such as to permit its passage through the entrance gateway ll of the bayonet slot upon rotation of the cylinder to its position aligning the gateway with the abutment, and as it is an object of this invention to obviate the necessity for turning the cylinder beyond either of its limits of rotation, the relative positions of the abutment and the gateway are such that the cylinder must be turned to an intermediate position to efiect alignment of these parts. The limits of rotation of the lock cylinder may be defined in any Way as by the engagement of the ends of the arcuate groove I8 with the abutment.

To preclude the passage of the abutment I9 through the entrance gateway and the possible disassembly of the cylinder from the mounting member, during the normal use of the lock, the effective width of the abutment I9 is increased to beyond that of the entrance gateway by means of a movable member 20 disposed adjacent one end of the abutment and forming in eiTect an extension thereof.

The movable member 20 may be of any desired or suitable construction, and in the present instance, is provided by an inturned end of a spring wire ring 2| encircling the supporting member II inwardly of the panel 02, the inturned end forming the movable member 20 passing through aligned openings 22 and 23 in the supporting member and the mounting member respectively. This particular construction is possible in the present embodiment, as the supporting structure is so designed that the exposed spring ring is not objectionable.

It is essential that the movable auxiliary abutment be accessible from the exterior of the mounting structure to enable its movement to inoperative position as illustrated in Figure 3, when it is desired to insert or remove the cylinder.

As is customary, the inner end of the cylinder has a driving cam 24, by which the rotation of the cylinder may be imparted to the mechanism to be actuated.

The mounting member 9 is retained assembled with the supporting member H in any desired manner as by means of a pin or set screw 25 passing through an aperture in the supporting member and engaging the mounting member.

From the foregoing description taken in connection with the accompanying drawings, it will be readily apparent to those skilled in the art, that this invention provides simple means for removably securing the lock cylinder in the mounting member in such a manner as to obviate turning of the cylinder beyond either of its normal limits to permit insertion or removal of the cylinder. It is also apparent that the lock structure of this invention requires no opening in the face of the lock which in past constructions has been necessary to enable insertion of a removing tool.

What I claim as my invention is:

1. In a lock comprising a bored mounting member, and a lock cylinder mounted therein, means to retain the cylinder in the mounting member bore comprising an abutment carried by the mounting member and adapted to be received in a bayonet slot in the lock cylinder, the bayonet slot having an entrance gateway, an abutment consisting of a plurality of adjacent parts which together have a width greater than that of the entrance gateway, and one of said abutment parts being movable out of its operative posigion to enable insertion and removal of the cylin- 2. In a lock device comprising a mounting member and a lock cylinder member rotatable therein between predetermined limits, means to removably secure the cylinder in the mounting member comprising an abutment carriedby one of said members and engageable in an arm of a bayonet slot in the other of said members, said bayonet slot having an entrance gateway and the abutment having a normal width greater than that of the entrance gateway and having a movable portion adapted to be moved to inoperative position to enable passage of the abutment through the gateway and hence permit the insertion and removal of the cylinder member, and

said abutment and entrance gateway being so located as to align when the cylinder is turned to a position intermediate its limits of rotation.

3. In a lock comprising a bored mounting member and a lock cylinder mounted therein, means to removably secure the lock cylinder in the mounting member comprising an abutment car-- ried by the mounting member and engageable in an arm of a bayonet slot in the lock cylinder, said bayonet slot having an entrance gateway and the abutment having a normal width greater than that of the entrance gateway and having a part accessible from the exterior of the mounting member and movable to a position reducing the width of the abutment to enable its passage through the entrance gateway and hence permit the insertion and removal of the lock cylinder.

4. In a lock, a mounting member, a lock cylinder mounted therein, means to removably secure the lock cylinder in the mounting member comprising a solid abutment carried by the mounting member and received in a bayonet slot in the lock cylinder, said bayonet slot having an entrance gateway to enable the passage of said solid abutment into and out of the bayonet slot, and means to increase the efiective width of the solid abutment so as to preclude its passage through the entrance gateway.

5. In a lock, a mounting member, a lock cylinder mounted therein, means to removably secure the lock cylinder in the mounting member comprising a solid abutment carried by the mounting member and received in a bayonet slot in the lock cylinder, said bayonet slot having an entrance gateway to enable the passage of said solid abutment into and out of the bayonet slot, and a member accessible from the exterior of the mounting member and adapted to occupy a position adjacent the solid abutment to increase the efiective width of the solid abutment and. preclude its passage through the entrance gateway.

6. In a lock device, a bored mounting member, a lock cylinder rotatable therein, means to secure the lock cylinder in the mounting member bore comprising a solid abutment carried by the mounting member and engageable in a bayonet slot in the lock cylinder, said bayonet slot having an entrance gateway through which the solid abutment may pass during insertion and removal of the cylinder from the mounting member, said abutment and entrance gateway being so located as to require rotation of the cylinder from its normal locked position to efiect alignment of said abutment and gateway, and means carried by the mounting member to increase the efiective width of the solid abutment and preclude its passage through the gateway, said means being movable to inoperative position.

'7. In a lock device, a bored mounting member, a lock cylinder rotatable therein, means to secure the lock cylinder in the mounting member bore comprising a solid abutment carried by the mounting member and engageable in a bayonet slot in the lock cylinder, said bayonet slot having an entrance gateway through which the solid abutment may pass during insertion and removal of the cylinder from the mounting member, said abutment and entrance gateway being so located as to require rotation of the cylinder from its normal locked position to effect alignment of said abutment and gateway, and a spring member carried by the mounting member and'having a part projecting therein to lie adjacent the solid abutment and increase its effective width to preclude itspassage through the gateway, said part being movable out of its operative position by the application of force on part of the spring member accessible from the exterior of the mounting member.

8. In a look, a mounting member, a lock cylinder member mountedtherein, and means to maintain said members assembled comprising a bayonet slot in one of said members, said bayonet slot having an entrance gateway lying in a plane parallel to the cylinder axis and an arcuate groove lying in a plane normal to the cylinder axis, and an abutment carried by the other member and engageable-in said arcuate groove of the bayonet slot, said abutment having a plurality of relatively movable parts lying in said plane of the groove and the combined width thereof being greater than that of the entrance gateway, and one of said abutment parts being movable to enable the passage of the remaining portion of the abutment through said gateway.

9. In a look, a mounting member, a lock cylinder member mounted therein, and means to maintain the lock cylinder member assembled with the mounting member comprising a bayonet slot in one of said members, said bayonet slot having an entrance gateway lying in a plane parallel with the cylinder axis and an arcuate groove lying in a plane normal to the cylinder axis, and a two part abutment carried by the other of said members to be received in the groove of said bayonet slot, said two parts of the abutment beingrelatively movable and lying side by side in said groove and having a combined width greater than the width of the entrance gateway of the bayonet slot so that removal and; insertion of the cylinder member requires movement of one of the abutment parts out of its operative position.

EDWARD N. JACOBI. 

